diff --git a/Sources/GrowthLapse/ContentView.swift b/Sources/GrowthLapse/ContentView.swift
index e2e55fe..6434de3 100644
--- a/Sources/GrowthLapse/ContentView.swift
+++ b/Sources/GrowthLapse/ContentView.swift
@@ -108,6 +108,13 @@ struct ContentView: View {
                     }
                     .help("Bestimmt die chronologische Reihenfolge der Quellvideos: nach Dateiname oder Änderungsdatum.")
 
+                    Picker("Mehrfach-Versionen", selection: $settings.duplicateClipSelection) {
+                        ForEach(DuplicateClipSelection.allCases) { selection in
+                            Text(selection.rawValue).tag(selection)
+                        }
+                    }
+                    .help("Wenn mehrere Dateien denselben Namen mit Endung 01, 02, 03 haben, wählt GrowthLapse nur eine Variante. Beispiel: '... 118 Wochen alt 01.MOV' und '... 118 Wochen alt 02.MOV'.")
+
                     if settings.videoEncoder == .videoToolbox {
                         Stepper(value: $settings.hardwareBitrateMbps, in: 2...80) {
                             HStack {
diff --git a/Sources/GrowthLapse/RenderSettings.swift b/Sources/GrowthLapse/RenderSettings.swift
index f71aada..a0ba7a2 100644
--- a/Sources/GrowthLapse/RenderSettings.swift
+++ b/Sources/GrowthLapse/RenderSettings.swift
@@ -15,6 +15,15 @@ enum SortMode: String, CaseIterable, Identifiable, Codable {
     var id: String { rawValue }
 }
 
+enum DuplicateClipSelection: String, CaseIterable, Identifiable, Codable {
+    case first = "Variante 1"
+    case second = "Variante 2"
+    case thirdIfAvailable = "Variante 3 wenn verfügbar"
+    case longest = "Längste Variante"
+
+    var id: String { rawValue }
+}
+
 enum VideoEncoder: String, CaseIterable, Identifiable, Codable {
     case x264 = "CPU: libx264"
     case videoToolbox = "Hardware: VideoToolbox H.264"
@@ -111,6 +120,7 @@ struct RenderSettings: Equatable {
     var fps: Int = 30
     var outputFormat: OutputFormat = .landscape1920x1080
     var sortMode: SortMode = .filenameAscending
+    var duplicateClipSelection: DuplicateClipSelection = .first
     var removeAudio: Bool = true
     var takeMiddleSegment: Bool = true
     var startOffset: Double = 0
@@ -140,6 +150,7 @@ struct PersistedRenderSettings: Codable {
     var fps: Int
     var outputFormat: OutputFormat
     var sortMode: SortMode
+    var duplicateClipSelection: DuplicateClipSelection?
     var removeAudio: Bool
     var takeMiddleSegment: Bool
     var startOffset: Double
@@ -168,6 +179,7 @@ struct PersistedRenderSettings: Codable {
         fps = settings.fps
         outputFormat = settings.outputFormat
         sortMode = settings.sortMode
+        duplicateClipSelection = settings.duplicateClipSelection
         removeAudio = settings.removeAudio
         takeMiddleSegment = settings.takeMiddleSegment
         startOffset = settings.startOffset
@@ -198,6 +210,7 @@ struct PersistedRenderSettings: Codable {
             fps: fps,
             outputFormat: outputFormat,
             sortMode: sortMode,
+            duplicateClipSelection: duplicateClipSelection ?? .first,
             removeAudio: removeAudio,
             takeMiddleSegment: takeMiddleSegment,
             startOffset: startOffset,
diff --git a/Sources/GrowthLapse/VideoProcessor.swift b/Sources/GrowthLapse/VideoProcessor.swift
index d24747d..32f9b5c 100644
--- a/Sources/GrowthLapse/VideoProcessor.swift
+++ b/Sources/GrowthLapse/VideoProcessor.swift
@@ -90,7 +90,13 @@ final class VideoProcessor: ObservableObject {
         temporaryDirectory = tempDirectory
         appendLog("Temporärer Ordner: \(tempDirectory.path)")
 
-        let videos = try await discoverVideos(in: inputFolder, sortMode: settings.sortMode, ffprobe: tools.ffprobe, excluding: outputFile)
+        let videos = try await discoverVideos(
+            in: inputFolder,
+            sortMode: settings.sortMode,
+            duplicateClipSelection: settings.duplicateClipSelection,
+            ffprobe: tools.ffprobe,
+            excluding: outputFile
+        )
         appendLog("\(videos.count) Video(s) gefunden.")
         let targetDimensions = outputDimensions(for: effectiveSettings, firstVideo: videos[0])
         appendLog("Zielauflösung der Zwischenclips: \(targetDimensions.width)x\(targetDimensions.height)")
@@ -173,7 +179,13 @@ final class VideoProcessor: ObservableObject {
         }
     }
 
-    private func discoverVideos(in folder: URL, sortMode: SortMode, ffprobe: URL, excluding outputFile: URL?) async throws -> [VideoFile] {
+    private func discoverVideos(
+        in folder: URL,
+        sortMode: SortMode,
+        duplicateClipSelection: DuplicateClipSelection,
+        ffprobe: URL,
+        excluding outputFile: URL?
+    ) async throws -> [VideoFile] {
         let supportedExtensions = Set(["mp4", "mov", "m4v", "avi", "mkv", "webm"])
         let excludedPath = outputFile?.standardizedFileURL.path
         let contents = try FileManager.default.contentsOfDirectory(
@@ -212,7 +224,110 @@ final class VideoProcessor: ObservableObject {
             result.append(VideoFile(url: url, duration: duration, width: dimensions.width, height: dimensions.height))
             appendLog("Dauer \(url.lastPathComponent): \(formatSeconds(duration)), \(dimensions.width)x\(dimensions.height)")
         }
-        return result
+        return selectDuplicateVariants(result, selection: duplicateClipSelection)
+    }
+
+    private func selectDuplicateVariants(_ videos: [VideoFile], selection: DuplicateClipSelection) -> [VideoFile] {
+        var groups: [String: [VideoFile]] = [:]
+        for video in videos {
+            guard let key = duplicateGroupKey(for: video.url) else {
+                continue
+            }
+            groups[key, default: []].append(video)
+        }
+
+        var selected: [VideoFile] = []
+        var handledGroups = Set<String>()
+
+        for video in videos {
+            guard let key = duplicateGroupKey(for: video.url),
+                  let variants = groups[key],
+                  variants.count > 1 else {
+                selected.append(video)
+                continue
+            }
+
+            guard !handledGroups.contains(key) else {
+                continue
+            }
+            handledGroups.insert(key)
+
+            let chosen = chooseDuplicateVariant(from: variants, selection: selection)
+            selected.append(chosen)
+            let skipped = variants
+                .filter { $0.url != chosen.url }
+                .map(\.displayName)
+                .joined(separator: ", ")
+            appendLog("Mehrfach-Version: \(duplicateDisplayName(for: key)) -> \(chosen.displayName) (\(selection.rawValue)); übersprungen: \(skipped)")
+        }
+
+        return selected
+    }
+
+    private func chooseDuplicateVariant(from variants: [VideoFile], selection: DuplicateClipSelection) -> VideoFile {
+        let sortedVariants = variants.sorted { left, right in
+            let leftVersion = duplicateVersionNumber(for: left.url) ?? Int.max
+            let rightVersion = duplicateVersionNumber(for: right.url) ?? Int.max
+            if leftVersion != rightVersion {
+                return leftVersion < rightVersion
+            }
+            return left.url.lastPathComponent.localizedStandardCompare(right.url.lastPathComponent) == .orderedAscending
+        }
+
+        switch selection {
+        case .first:
+            return variant(number: 1, in: sortedVariants) ?? sortedVariants[0]
+        case .second:
+            return variant(number: 2, in: sortedVariants) ?? sortedVariants[0]
+        case .thirdIfAvailable:
+            return variant(number: 3, in: sortedVariants) ?? sortedVariants.last ?? sortedVariants[0]
+        case .longest:
+            return sortedVariants.max { left, right in
+                if left.duration != right.duration {
+                    return left.duration < right.duration
+                }
+                let leftVersion = duplicateVersionNumber(for: left.url) ?? Int.max
+                let rightVersion = duplicateVersionNumber(for: right.url) ?? Int.max
+                return leftVersion > rightVersion
+            } ?? sortedVariants[0]
+        }
+    }
+
+    private func variant(number: Int, in variants: [VideoFile]) -> VideoFile? {
+        variants.first { duplicateVersionNumber(for: $0.url) == number }
+    }
+
+    private func duplicateGroupKey(for url: URL) -> String? {
+        let name = url.deletingPathExtension().lastPathComponent
+        guard let parsed = parseDuplicateSuffix(from: name) else {
+            return nil
+        }
+        return parsed.base.trimmingCharacters(in: .whitespacesAndNewlines).lowercased()
+    }
+
+    private func duplicateDisplayName(for key: String) -> String {
+        key.isEmpty ? "Unbenannte Gruppe" : key
+    }
+
+    private func duplicateVersionNumber(for url: URL) -> Int? {
+        parseDuplicateSuffix(from: url.deletingPathExtension().lastPathComponent)?.version
+    }
+
+    private func parseDuplicateSuffix(from filenameWithoutExtension: String) -> (base: String, version: Int)? {
+        let pattern = #"^(.*\S)\s+(\d{1,3})$"#
+        guard let regex = try? NSRegularExpression(pattern: pattern),
+              let match = regex.firstMatch(
+                in: filenameWithoutExtension,
+                range: NSRange(filenameWithoutExtension.startIndex..., in: filenameWithoutExtension)
+              ),
+              match.numberOfRanges == 3,
+              let baseRange = Range(match.range(at: 1), in: filenameWithoutExtension),
+              let versionRange = Range(match.range(at: 2), in: filenameWithoutExtension),
+              let version = Int(filenameWithoutExtension[versionRange]),
+              version > 0 else {
+            return nil
+        }
+        return (String(filenameWithoutExtension[baseRange]), version)
     }
 
     private func probeDuration(url: URL, ffprobe: URL) async throws -> Double {